Fundamentals and characteristics of solar radiation

Garg, H.P.; Datta, G.

doi:10.1016/0960-1481(93)90098-2

Cited by 17 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The amount of solar energy falling on the Earth's surface is affected by the Earth's rotation and the tilt of the Earth's axis to the ecliptic. The average intensity of the sunlight decreases with the increasing latitude and it also depends on local climatic conditions [18,19]. The solar radiation falling on the outer surface of the atmosphere is in an unscattered form; while passing through the atmosphere, it becomes scattered.…”

Section: The Calculation Of the Amount Of The Incident Solar Energymentioning

confidence: 99%

“…During the year this change of declination represents the interval between +23.45 ∘ (June 22) and −23.45 ∘ (December 22) [3,9,18]. The declination can be determined by the relation [7,9]:…”

Section: Introductionmentioning

confidence: 99%

“…where is the solar declination and is the day of the year. The solar declination varies; for each day of the year it has a different value [10,18]. The most common calculations take into account the only representative declination value for each month.…”

Section: Introductionmentioning

confidence: 99%

“…A mutual position of the Sun and the irradiated surface changes; it is given by the height of the Sun above the horizon and its azimuth [18] (by the diversion from the north-south axis) whereas the following equation is applied [8] as follows:…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Synergistic Effect of Thermal Collectors Rotation in relation to Their Energy Efficiency and Stagnation Compared with the Static Thermal System in the Conditions of Central Europe

Rimár¹,

Fedak²,

Hatala³

et al. 2015

International Journal of Photoenergy

View full text Add to dashboard Cite

The presented paper deals with the issue of the efficient use of solar energy potential gained from thermal panels via tracking the Sun’s trajectory. Based on long-term measurements of the selected parameters, the efficiency of the installed system in relation to the ecliptic was evaluated in the static regime as well as in a rotary regime. In the comparison of rotary and fixed system of the collectors the presented results show an increase of the effectiveness of rotary one during the period of the day. On closer view the increase is not constant. During the day it varies: the most significant increase is in the afternoon, while the time from 10:30 a.m. to 1:00 p.m. the effectiveness of both systems almost identical. The utilisation of the rotary system as a suitable instrument for the elimination of the system stagnation was also evaluated.

show abstract

Section: The Calculation Of the Amount Of The Incident Solar Energymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Synergistic Effect of Thermal Collectors Rotation in relation to Their Energy Efficiency and Stagnation Compared with the Static Thermal System in the Conditions of Central Europe

Rimár¹,

Fedak²,

Hatala³

et al. 2015

International Journal of Photoenergy

View full text Add to dashboard Cite

show abstract

“…Both non-renewable energies and renewable energies need raw material for their operation: For example, coal or oil, in the case of non-renewable energies; or wind or water in the case of renewable energies. In the case of photovoltaic solar energy, the raw material used is the solar radiation received in the photovoltaic installation [11,12]. Correctly estimating this global radiation or available solar resource is one of the main aspects that can help the development and improvement of photovoltaic systems.…”

Section: Introductionmentioning

confidence: 99%

Development of a Utility Model for the Measurement of Global Radiation in Photovoltaic Applications in the Internet of Things (IoT)

et al. 2019

View full text Add to dashboard Cite

In order to develop future projects in the field of photovoltaic solar energy, it is essential to accurately know the potential solar resources. There are many methods to estimate the incident solar radiation in a certain place. However, most of them are very expensive or do not have the ideal characteristics for good monitoring of a particular photovoltaic installation. For these reasons, an electronic device connected to the internet of things (IoT) is presented in this paper which manages to measure global radiation in photovoltaic applications. The device developed has been patented in the Spanish Patent and Trademark Office. It presents some features that make it very suitable to measure photovoltaic installations with the advantage of being a low cost and very reliable device. The device has been tested to determine global horizontal irradiance obtaining a correlation coefficient R2 = 0.994.

show abstract